A broken piece of a topaz crystal, bluish in daylight, with a surprisingly bright yellow fluorescence under longwave UV light. From: Zapot pegmatite, Gillis Range, Fitting Mining District, Mineral County, Nevada, USA.A miniature piece: 4 x 3 x 2 cm, 49 g.MinID:...
A streak of light green willemite crystal on a calcite matrix with a few, deep green, gemmy dioptase crystals as special guests. The willemite crystals are quite small, between 1 and 2 mm, but are all well formed, translucent, light green in color and there are scores...
Little cluster of well formed scheelite crystals. Dark colored in daylight, they fluoresce the typical bright blue under shortwave UV light and a quite nice orange/red under midwave UV light (a bit overexposed in the photo…). The blue shortwave fluorescence is...